These questions will help you to prepare the next exam. Try to answer them in your notebook:
1, What are the gametes? Describe the two types of gametes.
2. Explain the female reproductve system and all its components.
3. The male reproductive system: name the components and explain two of them.
4. Describe the fertilisation process, from the sexual intercourse until the fetus is formed.
5. Define the following terms: placenta - menstrual cycle - sex characteristics.
6. Define pure substance and mixture substance.
7. What is a solution? Name the componentes and write examples of solutions.
8. Name the separation techniques and expalin just one of them including an example.
9. Oxidation: explain the process and name the two types of oxidation (you do not need to explain them, only must be named).
10. Where does a chemical change occurs and what are the consequences? Give at least one example of chemical changes.